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From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>, "Kulasek, TomaszX"
 <tomaszx.kulasek@intel.com>
CC: "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: [dpdk-dev] [PATCH] doc: announce ABI change for rte_eth_dev
 structure
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Date: Wed, 20 Jul 2016 15:13:32 +0000
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Subject: Re: [dpdk-dev] [PATCH] doc: announce ABI change for
	rte_eth_dev	structure
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Hi Thomas,

> Hi,
>=20
> This patch announces an interesting change in the DPDK design.
>=20
> 2016-07-20 16:24, Tomasz Kulasek:
> > This is an ABI deprecation notice for DPDK 16.11 in librte_ether about
> > changes in rte_eth_dev and rte_eth_desc_lim structures.
> >
> > In 16.11, we plan to introduce rte_eth_tx_prep() function to do
> > necessary preparations of packet burst to be safely transmitted on
> > device for desired HW offloads (set/reset checksum field according to
> > the hardware requirements) and check HW constraints (number of
> > segments per packet, etc).
> >
> > While the limitations and requirements may differ for devices, it
> > requires to extend rte_eth_dev structure with new function pointer
> > "tx_pkt_prep" which can be implemented in the driver to prepare and
> > verify packets, in devices specific way, before burst, what should to
> > prevent application to send malformed packets.
> >
> > Also new fields will be introduced in rte_eth_desc_lim: nb_seg_max and
> > nb_mtu_seg_max, providing an information about max segments in TSO and
> > non TSO packets acceptable by device.
>=20
> We cannot acknowledge such notice without a prior design discussion.
> Please explain why you plan to work on this change and give a draft of th=
e new structures (a RFC patch would be ideal).

I think it is not really a deprecation note, but announce ABI change for rt=
e_ethdev.h structures.
The plan is to implement what was proposed & discussed the following thread=
:
http://dpdk.org/ml/archives/dev/2015-September/023603.html

Konstantin